[argyllcms] Re: Camera calibration: LUT only as good as matrix?
- From: Iliah Borg <iliah.i.borg@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Wed, 3 Jul 2013 10:26:28 -0400
Hi Torsten,
On Jul 3, 2013, at 4:08 AM, Torsten Bronger wrote:
> dcraw -M -o 0 -4 -T -A 2186 2678 51 118 -b 1.03 DSC02310.ARW
Use RawDigger instead, it has an interactive grid tool and it outputs a CGATS
file that txt2ti3 can use happily.
>
> The "-b 1.03" sets the brightness so that the GS0 patch has the
> desired value of approx 90.45. I don't know whether this is
> necessary. The -A parameter uses the patch GS4 for white
> balancing because it is supposed to be unsaturated according to
> the reference file.
>
> 2. Scan it in:
>
> scanin -p -a -F 1772,1437,4013,1410,4107,2614,1770,2651 \
> DSC02310.tiff /usr/share/color/argyll/ref/it8.cht R130103.txt
>
> 3. Create a profile:
>
> colprof -am -u DSC02310
At this stage you can use profcheck to generate deltaE2000 report using
Argyll/profcheck tool
profcheck -v2 -k <ti3 name> <profile name>
Now you can determine offending lines, delete those from ti3, create a new
profile and see if the result is any better.
--
Best regards,
Iliah Borg
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